Segment Reporting - Summary of Revenues, Gross Profit and Operating Income (Loss) by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 325,175	$ 293,908
Gross profit	67,412	54,414
Operating income (loss)	14,133	(4,139)
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	257,724	223,569
Gross profit	56,032	39,862
Operating income (loss)	12,517	(7,552)
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	26,827	27,619
Gross profit	4,514	5,414
Operating income (loss)	1,460	1,569
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	16,145	13,821
Gross profit	3,159	2,789
Operating income (loss)	408	159
Other foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	24,479	28,899
Gross profit	3,707	6,349
Operating income (loss)	$ (252)	$ 1,685